9 results about "Large droplet" patented technology

A droplet delivery device includes an ejector plate the produces a stream of droplets having a first large droplet size from a liquid supplied to the ejector plate and an impingement member that is positioned perpendicular to or at another non-parallel angle relative to an initial aerosol stream path produced from the ejector plate such that the one or more impingement members impinge the aerosol stream and reduce the size of droplets from the first larger size to one or more smaller droplet sizes.

The invention discloses a method and a system for optimizing mixing parameters of a self-adaptive driving emulsification pump, and relates to the technical field of emulsification control, and the method comprises the following steps: reading multi-stage mixing shear parameters and multi-stage preset emulsion droplet particle size characteristics; performing emulsion droplet particle size detection when executing the target emulsification task, generating a multi-stage emulsion droplet particle size detection data set, comparing the multi-stage emulsion droplet particle size detection data set with multi-stage preset emulsion droplet particle size characteristics, tracing particle size deviation, and determining an abnormal shear cavity and an abnormal emulsion diffusion cavity; abnormal diffusion correction is carried out on the abnormal emulsion diffusion cavity, and diffusion cavity optimization mixing parameters and abnormal correction time constraints are generated; and performing mixing parameter compensation on the abnormal shear cavity, and adjusting the multi-stage mixing shear parameters. The technical problems that in the prior art, due to the fact that the shearing cavity and the diffusion cavity are abnormal in the emulsifying process, the emulsion droplet particle size deviation is large, and stable control over the emulsifying quality cannot be achieved are solved, and the technical effects of dynamically compensating mixing parameters and improving the emulsion droplet particle size control precision and the consistency of emulsified products are achieved.

This invention provides a method and system for testing icing under rotating conditions of supercooled large water droplets, relating to the field of aero-engine icing testing. It aims to address the problem of excessive liquid water content caused by significant settling of supercooled large water droplets and the inability of the uniform cloud zone to cover the test specimen. The method includes: obtaining the projected area S of the rotating test specimen on the test cross-section under rotating conditions. A ; Obtain the overlapping area S of the cloud and fog region between the uniform cloud and fog region and the projected area of ​​the rotating test specimen. B The liquid water content obtained from the calibration test is L. B According to the projected area S A Area S where clouds and fog overlap B and liquid water content of L B The liquid water content L corresponding to the freezing condition of the rotating test piece was obtained. A By using the relative area of ​​the uniform cloud and fog zone and the test zone, liquid water is equivalently transformed. The freezing condition conversion method of the rotating state test under the freezing condition of supercooled large water droplets is adopted, which effectively supports the rotating state test under the freezing condition of supercooled large water droplets.

An apparatus and method of controlling the formation of droplets for generating EUV radiation. A droplet source includes a fluid exiting a nozzle and a subsystem having an electrically actuable element that creates a disturbance in the fluid. The droplet source produces a stream that breaks into droplets that in turn coalesce into larger droplets as the droplets progress toward an irradiation region. The electrically actuable element is driven by a control signal having a sinusoidal component and a square wave component. Various parameters, such as a phase difference between the sinusoidal component and the square wave component, are measured and controlled to minimize the formation of uncoalesced satellite droplets in the stream.

A supercooled large droplet detector capable of accurately and reliably identifying and distinguishing supercooled large droplet icing weather. The supercooled large droplet detector includes a detector base and a detection structure for detecting supercooled droplets in an air flow and for identifying and distinguishing supercooled large droplet icing weather from icing weather, the detection structure having an outer layer of temperature sensor layer, an intermediate layer of electrically heated film layer, and an inner layer of structural base, the electrically heated film layer providing heating energy through a plurality of electrically heated circuits to maintain a uniform temperature on the surface of the detection structure, the temperature sensor layer having a plurality of temperature sensors, and a controller disposed in the structural base, the controller inferring an impact range of a supercooled droplet by temperature changes at a plurality of different locations caused by the supercooled droplet impacting the detection structure, and determining whether the supercooled droplet that was previously impacted was a supercooled large droplet by determining whether the impact range exceeds a critical impact range for a supercooled droplet of a critical size impacting the detection structure.

A supercooled large droplet icing detector capable of automatically adapting to a sideslip angle of an aircraft, and an aircraft. The supercooled large droplet icing detector capable of automatically adapting to a sideslip angle of an aircraft comprises a probe (1), a wind vane structure (2), a transition structure (3), a support structure (4), a bearing (6), and a rotating shaft (7), wherein a first icing sensor (21) and a second icing sensor (22) are arranged on the probe (1), and are used for detecting an icing condition and distinguishing a supercooled large droplet icing condition; the wind vane structure (2) is connected between the probe (1) and the transition structure (3), and is used for automatically adjusting the probe (1) to follow the airflow direction under the action of wind; the transition structure (3) is connected between the wind vane structure (2) and the rotating shaft (7), and is used for generating an eccentric effect, so that the rotating shaft (7) can be driven to rotate under the force of the wind vane structure (2); the support structure (4) is mounted to an aircraft skin (5), and is used for supporting the supercooled large droplet icing detector; the bearing (6) is sleeved on the outer side of the rotating shaft (7), and is used for supporting and lubricating the rotating shaft (7) to rotate.

This invention relates to a device for detecting supercooled large water droplet icing in aircraft and the aircraft itself. The device includes a detector and a support connected to the detector. The detector comprises a head and a sidewall connected to the head. The head is an open cylinder forming a circular detector inlet. The sidewall is conical, and the detector also includes a central cone located within the sidewall. An annular detector outlet is formed between the tail of the sidewall and the tail of the central cone. A spiral resistance wire is arranged inside the sidewall to detect changes in current after the resistance wire encounters water, triggering an alarm. The inlet flow coefficient of the detector is equal to the ratio of the detector outlet area to the detector inlet area, and the inlet flow coefficient is less than 1. Based on the above technical solution, this invention achieves the following beneficial technical effects: it can effectively distinguish water droplet diameters, thereby detecting supercooled large water droplet icing.

The present application relates to a microfluidic device having an array of micro-pores that enables scalable and parallel multi-step reactions of droplets, and related methods of performing the reactions in two paired micro-pores of different sizes by a plurality of repeating capture cell units and sequential collection and fusion of the droplets. Droplets containing a desired substance or reaction reagent are input onto the microfluidic platform. Each aperture is configured to first capture a larger droplet, then repeatedly capture a smaller droplet, and then fuse the larger and smaller droplets. In some embodiments, this action is facilitated by tilting the chip. In some embodiments, the larger droplets consecutively fuse three paired batches of smaller droplets containing various desired components while incubating between fusing and loading. In alternative embodiments, each capture well has two or more active capture sites, enabling simultaneous fusion of multiple smaller droplets and multiple fusion.

The invention discloses a liquid drop collecting device and a liquid drop collecting method.The device comprises a liquid drop collecting assembly and an electric field generating assembly, and the liquid drop collecting assembly comprises a micro-fluidic chip, a liquid drop collecting chip and a liquid drop collecting bottle; the liquid drop collecting chip is respectively communicated with the micro-fluidic chip and the liquid drop collecting bottle, and the liquid drop collecting chip is vertical to the micro-fluidic chip; the liquid drop collecting chip is internally provided with a flow channel communicated with the micro-fluidic chip and the liquid drop collecting bottle, the flow channel comprises a first flow channel extending from the end close to the micro-fluidic chip to the interior of the liquid drop collecting chip, and the first flow channel is vertical to the micro-fluidic chip along the longitudinal direction; the electric field generating assembly is connected with the liquid drop collecting chip and is used for fusing the liquid drops in the liquid drop collecting chip into large liquid drops in a demulsification manner.